Tape including reactive layer and process for making the tape
The tape with a sulfur-crosslinked reactive layer and hydrocarbon elastomer PSA addresses the degradation issue in rubber-based tapes, providing clean removability and effective adhesion at high temperatures.
US12649871B2Active Publication Date: 2026-06-093M INNOVATIVE PROPERTIES CO
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Patents(United States)
- Current Assignee / Owner
- 3M INNOVATIVE PROPERTIES CO
- Filing Date
- 2022-02-03
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
Existing rubber-based tapes degrade at high temperatures due to the limitations of heat-reactive crosslinkers, leading to gel specks, viscosity fluctuations, and reduced crosslinking potential, making them unsuitable for high-temperature applications like automobile body painting.
Method used
A tape comprising a backing, a reactive layer with sulfur and partially crosslinked rubber, and a pressure-sensitive adhesive (PSA) with hydrocarbon elastomer and tackifying resin, which is crosslinked during hot melt processing to withstand high temperatures.
Benefits of technology
The tape maintains cohesive strength and clean removability from surfaces even at temperatures above 150°C, preventing adhesive transfer and ensuring effective adhesion and durability.
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Smart Images
Figure US12649871-D00000_ABST
Abstract
The tape includes a backing, a reactive layer on the backing, and a pressure sensitive adhesive on the reactive layer. The reactive layer includes sulfur and a rubber at least partially crosslinked with polysulfide bonds. The pressure sensitive adhesive includes a hydrocarbon elastomer that is at least partially crosslinked and a tackifying resin. The process includes applying a dispersion of the rubber and sulfur to the backing, drying the dispersion to provide the reactive layer, and applying a pressure sensitive adhesive composition comprising the hydrocarbon elastomer and the tackifying resin as a hot melt on the reactive layer to provide the tape.
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